Improvement in water-legs of steam-boiler fire-boxes



R. MONTGOMERY, Improvement in Water-Legs ofSteam-Boiier Fire-B 0xes1Patented May 7,1872

UNITED STATES PATENT OEEIoE.

RICHARD MONTGOMERY, OF NEW YORK, N. Y.

IMPRVEMENT IN WATER-LEGS OF STEAM-BOILER FIRE-BOXES.

Specification forming part of Letters Patent No. 126,476, dated May 7,1872.

SPECIFICATION.

I, RICHARD MONTGOMERY, of the city, county, and State of New York, haveinvented Improvements in the Construction of Corrugated- IronSteam-Boilers, of which the following is a specification:

My invention relates to the construction of the Water-legs or spacessurrounding the firebox of a steam-boiler, to contain water and formpart of the boiler, with sides of corrugated iron, each curved or archedinwardly, so as to resist the internal pressure therein without the needof transverse bolts and stays.

In the accompanying drawing, Figure 1 is a front elevation, partly insection, showing four corrugated fire-boxes as applied to a boiler. Fig.2 is an elevation in perspective of the fire-box and water-legs of asteam-boiler constructed according to my improvement, the end platesbeing removed.

A A, Fig. 2, are the side walls of that part of the steam-boiler Bconstituting its waterlegs and inclosing its fire-box C. These sidewalls, in common with the remainder of the boiler, are made ofcorrugated iron, and are each so curved inwardly as that each waterlegpresents the form of a double concave, the

crown of each curved or arched plate being made to project inwardly, asillustrated in Fig. 2. The ends of the arches or arched plates are tiedby means of transverse bolts D D, which constitute abutments therefor,although the weight of the superstructure of the boiler in itself willgenerally suflicc to prevent a springing of the arches.

By this construction of the water-legs the necessity of numerous stayand tie bolts is avoided, and the expense and danger of leakageattendant upon their use obviated; for the arched side plates,strengthened by corrugations running in the direction of their curve,will effectually resist all internal pressure thereon without theaddition of stays or bolts.

I claim as my invention- The water-legs of a steam-boiler, constructedwith inwardly-curved or arched sides, formed of metallic platescorrugated in the direction of the curve, substantially as and for thepurpose herein set forth.

R. MONTGOMERY.

Witnesses:

DAVID A. BURR, J AMZES S. GRINNELL.

